81051 ÷ 7 = 11578 R5
Let's divide 81051 by 7.

Step 1:
7 goes into 8 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 7 from 8 to get 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 7

Step 2:
7 goes into 11 1 times with a remainder of 4.
Write down 1 as next digit of of the result. 
Result so far: 11
Subtract 7 from 11 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 7

Step 3:
7 goes into 40 5 times with a remainder of 5.
Write down 5 as next digit of of the result. 
Result so far: 115
Subtract 35 from 40 to get 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 7

Step 4:
7 goes into 55 7 times with a remainder of 6.
Write down 7 as next digit of of the result. 
Result so far: 1157
Subtract 49 from 55 to get 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 7

Step 5:
7 goes into 61 8 times with a remainder of 5.
Write down 8 as next digit of of the result. 
Result so far: 11578
Subtract 56 from 61 to get 5.

The final result is 11578 with a remainder of 5.